serial: max310x: add macro for max number of ports

Add macro to hold the maximum number of UART ports per IC/device.

Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Reviewed-by: Jan Kundrát <jan.kundrat@cesnet.cz>
Tested-by: Jan Kundrát <jan.kundrat@cesnet.cz>
Link: https://lore.kernel.org/all/ddbc67dd-f8a3-4a6a-954a-bee49260ecab@cesnet.cz/
Signed-off-by: Hugo Villeneuve <hvilleneuve@dimonoff.com>
Link: https://lore.kernel.org/r/20240118152213.2644269-8-hugo@hugovil.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/serial/max310x.c b/drivers/tty/serial/max310x.c
index 21f2fa3a91e5b431f45ad1f9a7df3ea1f0aeb816..6549eee4f6a61ae827fe9d4ae99ff4d6d11f92f6 100644 (file)
--- a/drivers/tty/serial/max310x.c
+++ b/drivers/tty/serial/max310x.c
@@ -30,6 +30,7 @@
 #define MAX310X_MAJOR                  204
 #define MAX310X_MINOR                  209
 #define MAX310X_UART_NRMAX             16
+#define MAX310X_MAX_PORTS              4 /* Maximum number of UART ports per IC. */
 
 /* MAX310X register definitions */
 #define MAX310X_RHR_REG                        (0x00) /* RX FIFO */
@@ -1502,7 +1503,7 @@ static const struct max310x_if_cfg __maybe_unused max310x_spi_if_cfg = {
 static int max310x_spi_probe(struct spi_device *spi)
 {
        const struct max310x_devtype *devtype;
-       struct regmap *regmaps[4];
+       struct regmap *regmaps[MAX310X_MAX_PORTS];
        unsigned int i;
        int ret;
 
@@ -1604,7 +1605,7 @@ static int max310x_i2c_probe(struct i2c_client *client)
 {
        const struct max310x_devtype *devtype;
        struct i2c_client *port_client;
-       struct regmap *regmaps[4];
+       struct regmap *regmaps[MAX310X_MAX_PORTS];
        unsigned int i;
        u8 port_addr;